Ensure your DSC Impassa Alarm System is powered and ready to protect your home or business with the DSC PTC1620U AC Transformer. This reliable plug-in transformer provides consistent power to your system, charging the backup battery while it powers your system. The transformer is perfect for versions of the Impassa with integrated alarm communications that do not include a transformer. It delivers 16.5 Volts of AC Power at 20 VA and ensures your system is ready for any power outage. Purchase this transformer today to guarantee the optimal performance of your DSC Impassa Alarm System.